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From Marco Herrn ...@mherrn.de>
Subject Re: When is the UpdateManager definitely available?
Date Mon, 05 Nov 2012 13:01:14 GMT
Hi Jonathan,

thanks for your answer.
The gvgBuildCompleted is fired even earlier than gvtTreeRenderingCompleted.
So it may be a good option to use, but shouldn't help me with my exact
problem.
Maybe the answer from Thomas points to the right direction.


On Fri, Nov 02, 2012 at 04:53:37PM -0400, jonathan wood wrote:
>    Hi Marco, 
>      I use a slightly different overload:
>            canvas.addGVTTreeBuilderListener(new GVTTreeBuilderAdapter() {
>                @Override
>                public void gvtBuildCompleted(GVTTreeBuilderEvent e) {
>                    // do stuff                
>                }
>            });
>    On Fri, Nov 2, 2012 at 9:53 AM, Marco Herrn <[1]ml@mherrn.de> wrote:
> 
>      Hi,
> 
>      I must push this mail again.
>      It now happened again multiple times to me, that the the method
>      canvas.getUpdataManager() returned null when the gvgTreeRenderer
>      completed.
>      It happens seldom, but it does happen.
> 
>      Please see again the code snipped in the quoted text.
> 
>      Is it a bug in batik? According to the javadoc of the getUpdateManager()
>      method I would expect that it is guaranteed that getUpdateManager()
>      won't
>      return null when being called after being informed of rendering
>      completion.
> 
>      Any help appreciated.
>      Regards
>      Marco
> 
>      On Fri, Jul 20, 2012 at 03:38:45PM +0200, [2]ml@mherrn.de wrote:
>      > Hi I am using the following code:
>      >
>      > canvas.addGVTTreeRendererListener(new GVTTreeRendererAdapter() {
>      >         @Override
>      >         public void gvtRenderingCompleted(GVTTreeRendererEvent e) {
>      >          
>      canvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(runnable);
>      >         }
>      >       });
>      >
>      > to do some changes in the DOM of an SVG document. I expected that the
>      > updatemanager is definitely available when gvtRenderingCompleted was
>      > called.
>      > However, it now happened at least once that I got a
>      NullPointerException
>      > on the line
>      >  
>      canvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(runnable);
>      >
>      > So it seems that there is still no guarantee that the UpdateManager is
>      > available then. Am I missing something? Must I register on a different
>      > listener?
> 
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-- 
Marco Herrn - IT-Berater Individualsoftware
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